Blodgett 54388 Ignition Module Fenwal HV100G

Blodgett 54388 Fenwal HV100G Ignition Module

The Blodgett 54388 is a Fenwal HV100G ignition module used in the burner-control circuit of commercial Blodgett ovens. It is responsible for the high-voltage spark output and the flame-proving logic that determines whether the burner can remain on. In a gas oven, the ignition module acts as the coordinator between the heat call, spark electrode, gas valve, and flame signal.

When the oven calls for heat, the module starts an ignition trial. It sends spark to the electrode and coordinates gas valve operation according to the oven safety sequence. Once the burner lights, the module must sense flame through the flame-rectification path. If it does not detect flame, it interrupts the burner operation to prevent unsafe gas flow. That means a weak ground, dirty flame rod, poor burner flame, or damaged wire can cause the same symptoms as a failed module.

Failure Symptoms Technicians See

• Igniter does not spark during startup.
• Spark is present, burner lights, then shuts off after a few seconds.
• Module locks out during trial for ignition.
• Intermittent heat loss after vibration or heat expansion.
• Gas valve output is missing even though the thermostat is calling.
• Flame signal is unstable because of grounding or electrode contamination.

Diagnostic Approach

A technician should measure input voltage to the module, verify ground integrity, inspect the spark electrode and wire, check gas valve output, and clean the burner/flame-sensing area. Flame rectification depends on a clean flame path and solid ground. If all inputs are correct and the module will not generate spark, will not energize output, or will not recognize flame, the 54388 module is a likely cause.

FAQ

What does the Blodgett 54388 module do?
It produces spark and monitors flame signal in the commercial oven ignition sequence.

Why does the oven spark but not stay lit?
The module may not be reading flame, or the flame-sense electrode, ground, burner, or wiring may be faulty.

What is the Fenwal HV100G reference?
It identifies the ignition module style associated with this Blodgett part number.

What related components should be inspected?
Spark electrode, flame sensor, gas valve, burner, ground path, thermostat call, and wiring harness.

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